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a6aff4f950
On sudden f2fs shutdown, write pointers of zoned block devices can go further but f2fs meta data keeps current segments at positions before the write operations. After remounting the f2fs, this inconsistency causes write operations not at write pointers and "Unaligned write command" error is reported. To avoid the error, compare current segments with write pointers of open zones the current segments point to, during mount operation. If the write pointer position is not aligned with the current segment position, assign a new zone to the current segment. Also check the newly assigned zone has write pointer at zone start. If not, reset write pointer of the zone. Perform the consistency check during fsync recovery. Not to lose the fsync data, do the check after fsync data gets restored and before checkpoint commit which flushes data at current segment positions. Not to cause conflict with kworker's dirfy data/node flush, do the fix within SBI_POR_DOING protection. Signed-off-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com> Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org> |
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| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.